Table 1.
Symptom instance definitions
| SMI concept | Keyword strings | Modifier strings | Lax or strict modifiers | SNOMED-CT (SCTID)† |
|---|---|---|---|---|
| Aggression | aggress* | 61372001 | ||
| Agitation | agitat* | 106126000 | ||
| Anhedonia | anhedon* | 28669007 | ||
| Apathy | apath* | 20602000 | ||
| Arousal | arous* | (none) | ||
| Blunted or flat affect | Affect | blunt*, flat*, restrict* | Optional | 6140007/932006/39370001 |
| Catalepsy | catalep* | 247917007 | ||
| Catatonic syndrome | catatoni* | 247917007 | ||
| Circumstantial speech | circumstan* | 18343006 | ||
| Deficient abstract thinking | Concrete | 71573006 | ||
| Delusions | delusion* | 2073000 | ||
| Derailment of speech | derail* | 65135009 | ||
| Diminished eye contact | eye contact | 412786000 | ||
| Disturbed sleep | Sleep | not, poor*, interrupt*, nightmare*, disturb*, inadequat*, disorder*, prevent*, stop*, problem*, difficult*, reduced*, less*, impair*, erratic*, unable*, worse*, depriv* | Optional | 26677001 |
| Echolalia | Echolalia | 64712007 | ||
| Echopraxia | Echopraxia | 33184005 | ||
| Elation | elat* | 34822003 | ||
| Elevated mood | Mood | elevat* | Mandatory | 81548002 |
| Emotional withdrawal | withdraw* | 247755007 | ||
| Euphoria | euphor* | 85949006 | ||
| Flight of ideas | flight of idea | 28810003 | ||
| Formal thought disorder | Ftd thought disorder |
41591006 | ||
| Grandiosity | grandios* | 247783009 | ||
| Hallucinations | hallucinate* | audit*, visual*, olfact*, tactil*, third person, first person, 3rd person, 1st person, | Optional | 45150006/64269007/39672001/66609003/277533007/ |
| Hostility | hostil* | 79351003 | ||
| Immobility | immobil* | 404975000 | ||
| Insomnia | insom* | 193462001 | ||
| Irritability | irritabl* | 55929007 | ||
| Loosening of associations | associat* | 55346003 | ||
| Loss of coherence | coheren* | 284596004 | ||
| Low mood | Mood | 366979004 | ||
| Mannerisms | Mannerism* | 248026005 | ||
| Mutism | Mute Mutism |
88052002 | ||
| Negative syndrome | negative symptom* | (none) | ||
| Paranoia | paranoi* | 191667009 | ||
| Persecutory ideation | persecu* | 216004 | ||
| Perseverance | persever* | 44515000 | ||
| Poor motivation | motivat* | 26413003 | ||
| Poor rapport | Rapport | 710497003 | ||
| Posturing | postur* | 271694000 | ||
| Poverty of speech | speech* | poverty*, impoverish* | Mandatory | 72123004 |
| Poverty of thought | poverty of thought | 56435009 | ||
| Pressured speech | speech* | pressure* | Mandatory | 53890003 |
| Rigidity | rigid* | 311535006 | ||
| Social withdrawal | withdraw* | social* | Mandatory | 105411000 |
| Stereotypy | stereotyp* | 84328007 | ||
| Stupor | stupor* | 89458003 | ||
| Tangential speech | tangent* | 74396008 | ||
| Thought block | though* block | 2899008 | ||
| Waxy flexibility | Waxy | 13052006 |
†Best matches in SNOMED-CT, UK-edition v20160401.
SMI, severe mental illness; SNOMED, Systematized Nomenclature of Medicine; SNOMED-CT (SCTID), Systematized Nomenclature of Medicine—Clinical Terms Identifier.